从企业长远的、可持续发展的战略角度来看,故意人为制造的进入壁垒只能是一种短期策略,而企业真正赖以生存的还是它的()。
A.低成本
B.专利产品
C.边际成本
D.关键技术
参考答案:D
I'm _ tired. I want to have a rest.[ ]
A. little
B. a bit
C. a few
D. a lot of
Mathematics()study or science of numbers.
A.is
B.are
C.was
D.were